Merge pull request #20324 from lamberta/r1.9-cherrypicks
authorMichael Case <mikecase@google.com>
Wed, 27 Jun 2018 16:50:35 +0000 (09:50 -0700)
committerGitHub <noreply@github.com>
Wed, 27 Jun 2018 16:50:35 +0000 (09:50 -0700)
1.9-cherry-pick-request: Doc updates for get_started page and nav


Trivial merge